WINDOWS 7

Windows 7 Professional x64 (64-bit)

English: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65805/X15-65805.iso
German: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65813/X15-65813.iso
French: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65811/X15-65811.iso
Spanish: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65843/X15-65843.iso

Windows 7 Professional x86 (32-bit)

English: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65804/X15-65804.iso
German: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65812/X15-65812.iso
French: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65810/X15-65810.iso
Spanish: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65842/X15-65842.iso

Windows 7 Home Premium x64 (64-bit)

English: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65733/X15-65733.iso
German: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65741/X15-65741.iso
French: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65738/X15-65739.iso
Spanish: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65771/X15-65771.iso

Windows 7 Home Premium x86 (32-bit)

English: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65732/X15-65732.iso
German: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65740/X15-65740.iso
French: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65738/X15-65738.iso
Spanish: http://msft-dnl.digitalrivercontent.net/msvista/pub/X15-65770/X15-65770.iso

Windows 7 Enterprise [English 60 Days Trial] – Source]

32-bit (x86): 7600.16385.090713-1255_x86fre_enterprise_en-us_EVAL_Eval_Enterprise-GRMCENEVAL_EN_DVD.iso
64-bit (x64): 7600.16385.090713-1255_x64fre_enterprise_en-us_EVAL_Eval_Enterprise-GRMCENXEVAL_EN_DVD.iso

Windows 7 Ultimate x64 (64-bit)

[Unofficial] English: http://91.121.99.184/paolo/win7-64bit.iso

Windows 7 Ultimate x86 (32-bit)

[Unofficial] English: http://91.121.99.184/paolo/win7.iso

Windows 7 N Version Direct Download Links [Windows 7 N English for Europe - No Windows Media Player (WMP12)]

Windows 7 Home Premium N x86 (32-bit): http://msft-dnl.digitalrivercontent.net/msvista/pub/X16-13457/X16-13457.iso
Windows 7 Home Premium N x64 (64-bit): http://msft-dnl.digitalrivercontent.net/msvista/pub/X16-13459/X16-13459.iso
Windows 7 Professional N x86 (32-bit): http://msft-dnl.digitalrivercontent.net/msvista/pub/X16-13548/X16-13548.iso
Windows 7 Professional N x64 (64-bit): http://msft-dnl.digitalrivercontent.net/msvista/pub/X16-13550/X16-13550.iso

Note: Use download manager to ensure proper download as the file size is bigger than 2GB. All ISOs above contains Windows 7 RTM build version 6.1.7600.16385.

Tip 1: To convert an installed Windows 7 to another language, download Windows 7 language packs and install.

Tip 2: To enable selection of Windows 7 edition to install during setup, uses ei.cfg Removal Utility.

Tip 3: Use Windows 7 ISO Image Edition Switcher to change edition of a Windows 7 ISO.

Source

Update 1: Download Windows 7 SP1 official ISO (SP1-U version)

Update 2: Download Windows 7 with SP1 Integrated ISO